#include<stdio.h>

int main()
{
 	int c,s;
 	float p,w,d,f;
 	printf("please enter price,weight,distance:");
 	scanf("%f%f%d",&p,&w,&s);
 	if(s>=3000) c=12;
 	else c=s/250;
 	switch(c)
 	{
 		case 0:d=0;break;
 		case 1:d=2;break;
 		case 2:
 		case 3:d=5;break;
 		case 4:
 		case 5:
 		case 6:
 		case 7:d=8;break;
 		case 8:
 		case 9:
 		case 10:
		case 11:d=10;break;
		case 12:d=15;break;
	}
	f=p*w*s*(1-d/100);
	printf("freight=%10.2f\n",f);
 	return 0;
}

